I don't see what the big deal is. Don't get me wrong, I can get emotionally attatched with video game characters, especially Fire Emblem, but why does it matter that much?
Perhaps there is bias with my inability to feel anger, but if they deconfirm a character I want, I really don't care. God, even with all Dedede has going for him, even if they posted "Haha idiots! You thought Dedede was going to be in, but he's not! Not even a Sticker!" I wouldn't care. It's not like a character not being in the game makes it worse. Just that putting in more characters makes it better. The currently presented roster is satisfactory, so anything that comes beyond it doesn't matter.